Exterior shell of a truck cab body



FIG. 1 is a side elevation view of an exterior shell of a truck cab bodyshowing our new design, it being understood that the opposite side is amirror image thereof and that the broken lines are for illustrativepurposes only and form no part of the claimed design;

FIG. 2 is an enlarged front elevation view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is an enlarged rear elevation view, it being understood that thelower front edge and front interior surface thereof have been omittedfor clarity of illustration.

The ornamental design for an exterior shell of a truck cab body, asshown and described.